Sample
serde 1.0.229: Serializing and deserializing standard reference-counted pointers Arc and Rc requires the opt-in rc Cargo feature flag on serde, which serializes transparently as the inner value but reconstructs independent allocations without preserving pointer identity on deserialization
Verified sample for cargo serde 1.0.229: Serializing and deserializing standard reference-counted pointers Arc and Rc requires the opt-in rc Cargo feature…
sha256:f0ad4e3ab201836071af9cefac451cce8df1d38e84696edbfe4693293ec025f3
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
rust linux x64 rust rust cargo
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| rust 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-16 |
| rust 1 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-18 |
Case
HOW- Goal
- Serializing and deserializing standard reference-counted pointers Arc and Rc requires the opt-in rc Cargo feature flag on serde, which serializes transparently as the inner value but reconstructs independent allocations without preserving pointer identity on deserialization
- Packages
- Symbols
-
- serde::Serialize
- serde::Deserialize
- std::sync::Arc
- std::rc::Rc
- Environment
- rust
- Created
- 2026-08-16T06:41:41Z
Contract
- assert structs containing Arc<T>, Rc<T>, Arc<str>, and Arc<[u8]> serialize to JSON transparently without pointer envelope overhead when serde rc feature is enabled
- assert deserializing reference-counted fields reconstructs valid data identical to the original values
- assert deserialization allocates distinct independent Arc instances for shared pointers without preserving in-memory pointer identity or strong reference counts
- assert deserializer validates inner types inside Arc and Rc and propagates deserialization errors properly
Files
- .gitignore
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs